CN1027400C - Intelligent computer integrated maintenance system and method - Google Patents
Intelligent computer integrated maintenance system and method Download PDFInfo
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- CN1027400C CN1027400C CN91104929A CN91104929A CN1027400C CN 1027400 C CN1027400 C CN 1027400C CN 91104929 A CN91104929 A CN 91104929A CN 91104929 A CN91104929 A CN 91104929A CN 1027400 C CN1027400 C CN 1027400C
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Abstract
An intelligent computer integrated maintenance system and method may be used with a group of machines which require maintenance, known as a ''complex'', such as a group of production lines. The intelligent computer integrated maintenance system includes an electronically stored parts manual which contains a hierarchical listing of all parts in the production machines. The hierarchical listing contains a complete bill of materials which breaks each machine into subassemblies and breaks each subassembly into its subassemblies down to the level of individual parts. The intelligent computer integrated maintenance system also includes a maintenance operations computer controller which includes a maintenance schedule management subsystem, an engineering change control subsystem, a parts manual management subsystem and a spares inventory management subsystem.
Description
The present invention relates to corrective maintenance, relate in particular to computer generalization maintenance system and method.
Computer integrated manufacturing system is widely used in contemporary manufacturing industry, with the operation of controlling one or more makers' many manufacturing machines or producing machine.These machines can be organized into production line, every production of machinery one specific products.Article one, these machines on the production line can interconnect by function, if machine hinders for some reason or maintains and fail in placely like this, whole production line just can not be produced, perhaps Production Line limited ability system.Computer integrated manufacturing system can be used to control material the flowing from a machine to another machine when producing machine and producing a kind of product.The computer integrated manufacturing system required raw-material buying of a kind of product that also can be used to arrange production, and all machines are made total activation, so that at want seeking time, the product of every production line production requirement.
For improving the dirigibility of extensive manufacturing production efficiency and manufacturing, computer integrated manufacturing system is now widely installed and is used.Representational computer integrated manufacturing system is " management of pocket builder and similar machine and analytic system " at the 4th, 346, No. 446 autographs of the United States Patent (USP) of authorizing people such as Erbstein; Be " manufacturing system flexibly " at the 4th, 472, No. 783 autographs authorizing people such as Johstone; The 4th, 457, No. 772 autographs authorizing people such as Hagne for " glass utensils shaping management control system " and the 4th, 803, No. 634 autographs authorizing people such as Ohno for " newspaper printing industries process control system " in all existing the description.
Comprise that multi-level computer control is organized and the computer integrated manufacturing system of information of system of distributing control workshop one deck at the United States Patent (USP) the 4th of authorizing people such as Beasley, 827, No. 423 autograph is existing description the in " computer integrated manufacturing system ", this patent is transferred the possession of and assignee of the present invention, quote at this, as reference.In this invention of people such as Beasley, the data and the bill of materials of production scheduling data and relevant technology, product and material specification, all in higher level's level computer system, produce, and through transferring the computing machine to subordinate's level control Workshop Production process after the processing on demand.Higher level's computing machine can with subordinate's compunication, and information is transmitted in peer computer mutual communication dealing on demand.
Previously presented skill is to add a maintenance module in computer integrated manufacturing system, so that the maintenance of production machine is merged in the computer integrated manufacturing system.For example, in people's such as above-mentioned Haynes ' No. 772 patent, a kind of glassware production control system that emm message is provided is disclosed.In people's such as above-mentioned Ohno ' No. 634 patent, the controlling of production process computing machine that comprises material and maintenance control subsystem has been described also.This material and maintenance control subsystem are being controlled the replacing time of parts.The part replacement time is that the accumulated total according to the bimetry of easily worn part and working time precomputes, and is shown or print, so that parts are ordered goods.Maintenance system comprises a part of catalogue file, wherein contains all easily worn part catalogues of system.The parts catalogue file is to be revised by the information of collecting the associated machine operation in good time, so that calculate the residue mission life of easily worn part.When needs are changed parts, the quantity in stock of the number of components that is used for changing from the parts stock file deducted.When the parts inventory amount in the parts stock file is less than parts enquiry amount, then print a purchase order.In other words, provide one " ordering point " system.The flowing water of lapse of time amounts to through calculating, and makes comparisons with the endurance life of parts, calculating actual replacings time and date, and makes and maintains arrangement.
This technology has recognized that, computer integrated manufacturing system is incorporated into the potential benefit that the computer generalization maintenance system is had.Really, the computer integrated manufacturing system of the exquisiteness of controlling for many production machines of many production lines of one or more factories is controlled and is dispatched maintenance by computing machine and almost is absolutely necessary.Regrettably, previously known computer generalization maintenance system and fail intelligently maintenance and manufacturing are combined.For example, in the active computer Integrated Maintenance System, computing machine can be arranged low preferential maintenance operation, and for example changing oil of a production line machine may be about to carry out after the week although the big maintenance of this production line is operated.Equally, " ordering point " system of zero spare part can drop to the systematic inventory number at stock's number and send new parts order when following, although in fact this machine works as dispatcher, changes soon.Equally, the computer generalization maintenance system can be formulated a series of maintenance operations that will carry out simultaneously, although there are not enough manpowers to carry out this all maintenance when the time comes.
Thereby, need a kind of " intelligence " computer generalization maintenance system, only make not only by add with accumulative hours arrange maintenance and the time number make maintenance arrangement when reaching a predetermined number.The intelligence maintenance system also must be made not only and to be dropped to predetermined number the stock and make that the maintenance parts order goods when following, only is the function of ordering point system.
Complicated day by day along with computer integrated manufacturing system, urgent further to the needs of the computer generalization maintenance system of intelligence.Because the increase of controlled machine quantity and simultaneously controlled production line quantity, people wants enough at length understand whole workflow so that the maintenance indication that provided of corrected Calculation machine Integrated Maintenance System difficulty very advisably.Equally, a people will distribute all maintenance datas and revise also very difficult by the given zero spare part order indication of ordering point system advisably.
The present invention provides a kind of intelligent computer integrated maintenance system that is used for computer integrated manufacturing system, wherein computer integrated manufacturing system comprises the computer control of controlling many production lines, and each production line comprises many production machines of producing a specific products.This manufacturing system computer control comprises the total activation file of an electron storage, comprising a scheduling of production line actual production and planned production, so that the manufacturing system computer control is controlled the production machine according to the planned production in the total activation file.
According to the present invention, this computer generalization maintenance system comprises the components list of electronics storage, wherein contains the parts layered directory in many machines of many production lines.The components list of electron storage is not only the catalogue that comprises rapid wear or maintenance parts.Preferable is the complete inventory that it comprises the material in every machine of each bar production line.The bill of materials is included in the layered directory, and wherein every machine resolves into each assembly, and then resolves into sub-assembly, decomposes each component layer always.Preferable is that the components list of this electron storage comprises the corresponding image file of the parts layered directory that each level is described.
This intelligent computer integrated maintenance system also comprises maintenance operational computations machine controller, and it links to each other with the components list of electron storage, and is used for linking to each other with the total activation file.According to the present invention, maintenance operational computations machine controller comprises four subsystems; (1) maintaining and dispatching ADMINISTRATION SUBSYSTEM; (2) engineering change management subsystem; (3) components list ADMINISTRATION SUBSYSTEM; And (4) zero Parts Inventory ADMINISTRATION SUBSYSTEM.
The maintaining and dispatching ADMINISTRATION SUBSYSTEM produces total maintaining and dispatching.The maintaining and dispatching ADMINISTRATION SUBSYSTEM obtains the actual production of all production lines and the scheduling of plan from the total activation file.It maintains in predetermined period to judge the parts in the layered directory also with components list ADMINISTRATION SUBSYSTEM interface, according to resulting actual production and planned production scheduling, each is determined parts also judges a corresponding service time in predetermined period simultaneously.
Yet, maintaining and dispatching ADMINISTRATION SUBSYSTEM of the present invention also not only produces the maintenance instruction according to each predetermined period that parts calculated that is determined, but assign service time again to being determined parts according to the classification parts catalogue in the components list of electron storage, to reduce each bar Production Line leeway.According to the service time of reassigning, produce a planned production scheduling of revising, and the total activation file in the computer integrated manufacturing system is given in passback.Thereby according to the correction of planned production scheduling many production lines are controlled, so that when producing to greatest extent, can maintain activity again.
According to the present invention, maintenance operational computations machine and according to actual production and planned production scheduling is not only dispatched service time.But rearrange the service time that in predetermined period, is determined according to the classification parts catalogue in the components list of electron storage, to reduce each bar Production Line loss of time.For example, each Production Line scheduling is analyzed to determine that whether this production line has been scheduled is intended off line in a period of time of the service time that quite approaches to calculate, so that can postpone maintenance or be advanced to the machine off line time.
The present invention recognizes, produce and maintenance both contentions machine, thereby non-key maintenance task scheduling stop time, so that make the production time reach maximum.Equally, dispatched in one period short time when a series of maintenance tasks of a production line, the maintenance task is just organized into groups, so that can all be carried out simultaneously.For example, the maintenance task of decidable most critical, and the maintenance task of this production line all other can be dispatched in the identical time of key maintenance task and carried out.So shut down and reach minimum.
According to a further aspect in the invention, after the computing machine correction maintaining and dispatching, also calculate the manpower requirement of carrying out maintenance.If manpower requires to surpass the manpower that can supply, the maintenance task is just dispatched by the classification of key/critical, so that can just carry out a group task for somebody's power.
Intelligent computer integrated maintenance system of the present invention also tolerable is carried out iteration maintenance operation planning.The for example practicable maintenance operation of phase for many years strategic plan, so that determine the manpower requirement, the actual production capacity that zero spare part requires and comprises service time.Also practicable mid-term is the maintenance operation planning in year for example, so that determine that the parts order requires, manpower can supply situation and like that.And then for example maintenance operation planning of day degree of also practicable short-term, adjust so that produce per diem maintenance.Thereby, the iteration of maintenance operation planning practicable long term, mid-term and short-term.
Intelligent computer integrated maintenance system of the present invention as mentioned above also comprises the components list ADMINISTRATION SUBSYSTEM of a control assembly list file.This components list file comprises the complete bill of materials of each production machine.The electronic storaging part list file not merely comprises parts rapid wear or maintenance, but comprises all parts of the machine in the layered directory of a common employing 5-6 hierarchy of components, like this, just has the complete subsystem that this machine is described.Preferable is that the electron storage image of each level is the memory unit catalogue also, so that decidable maintenance parts and simplification maintenance.According to the present invention, all parts in layered directory all are classified as " rapid wear ", " replaceable ", " generally " or " not stock ".The easily worn part number that is those when using is judged the parts of its zero service parts planning.Field-replaceable unit is failure rate averaging time running time recently determined maintaining and dispatching.General parts resemble screw, keep a collection of stock, and adopt the ordering point system.Be to be generally the not stock parts that do not maintain parts at last, generally refuse stock, and when actual needs, just order goods.
The electronic memory component list file can comprise the more than one part number of each parts of system.More particularly, each parts can comprise-" general component identification " or " international component code " with show one general, usually be that not expensive industry standard part can be in order to substitute the particular portion piece number of manufacturing firm.Available " replacement part number " is to show available not only parts in this specific maintenance operation simultaneously.Simultaneously available " change part number " changes criterion to show a certain definite date or other, must be with the part of correction portion piece number as following " engineering change control " step that will illustrate.The electronic storaging part table can be discharged into each and produce the relevant local calculation machine of machine, so that the classification declaration of each associated production machine can be found in its relevant computing machine.The electronic storaging part table also can be included in personal computer, CD-ROM or other memory storage.The electronic storaging part table can be included in the computing machine identical with intelligent computer integrated maintenance system, or in the discrete thus computing machine.
The zero Parts Inventory ADMINISTRATION SUBSYSTEM of intelligent computer integrated maintenance system can be ordered zero spare part according to predicted maintenance rather than according to predetermined inventory level.Zero spare part budget also is received.According to the present invention, general parts are to drop to predetermined ordering point with common ordering point system in tank farm stock to make order when following.Yet for field-replaceable unit, component demand is to calculate averaging time by the production requirement of time adjustment (time phased) and fault.The components list file is to be used for the production schedule is expanded to part replacement automatically.The requirement of changing parts is to be about to surpass its fault at these parts send in this week of averaging time, and produces the order of these parts, and perhaps these parts are ordered goods via the electronics mode.
The engineering change control documents interface of engineering change control and management subsystem and computer integrated manufacturing system is so that hold engineering change intelligently.The engineering change control documents is represented to produce machine and is made engineering change, so that machine upgrading or reorganization are produced machine to produce new product.This scheduling of engineering change is incorporated into the maintaining and dispatching ADMINISTRATION SUBSYSTEM, in components list ADMINISTRATION SUBSYSTEM and the zero Parts Inventory ADMINISTRATION SUBSYSTEM.For example serviceable life of a machine finally, the maintenance that has adjusted promptly lies on the table or cancels.Equally, also be not these machines orders below the predeterminated level even maintenance parts stock drops to, so as machine when retired the stock can be used up.According to the present invention, engineering change can be enrolled the maintenance operation, and its introducing is controlled in engineering change when promptly being required to make by specific maintenance by a fixed date, a regulation zero Parts Inventory level or appointment.
Computer generalization maintenance system of the present invention and method can intelligent manner be attached to the maintenance operation in the production.If used, production efficiency all can reach to greatest extent with the use of the maintenance manpower that has.Engineering change and machine upgrading can easily be included in, and waste maintenance zero Parts Inventory subthreshold under the minimum situation at zero spare part.
Computer generalization maintenance system of the present invention and method do not need to link use with the situation of an above-mentioned production line.Really, computer generalization maintenance system of the present invention and method do not need to link with a computer integrated manufacturing system or link use with manufacturing fully.Computer generalization maintenance system of the present invention and method can with carry out main or important function and require any a group machine or the device of maintenance to link use.This a group machine is called " unit " this spy.
According to the present invention, one " unit " can comprise an aforesaid production line.Unit also can comprise the machine that does not all have the many platform independent that link on the production line on structure or function.For example, the present invention can be used for controlling the maintenance in the job shop with many independently lathes.
According to the present invention, one " unit " also can comprise and produce or make some irrelevant fully machines.For example, by the aircraft fleet or the automotive fleet of airline, car rental station, company or government organs' operation, be exactly a unit according to the present invention,, this fleet or fleet also require maintenance because having a premiere feature.Equally, the big number in a building can comprise the row's elevator that also has maintenance to require.Consistent with premiere feature, the present invention can be used for controlling intelligently the maintenance of aircraft, automobile or elevator.
Fig. 1 is the schematic block diagram of intelligent computer integrated maintenance system of the present invention.
Fig. 2 is an illustrated embodiment example of the components list file of key diagram 1.
Fig. 3 is the example of explanation according to engineering change control procedure of the present invention.
Fig. 4 is the block scheme of the maintaining and dispatching ADMINISTRATION SUBSYSTEM of Fig. 1.
The maintaining and dispatching ADMINISTRATION SUBSYSTEM of Fig. 5 key diagram 4 is with regard to operation that maintenance project at a specified future date carried out.
The operation that the maintaining and dispatching ADMINISTRATION SUBSYSTEM of Fig. 6 A-6C key diagram 4 is carried out with regard to the yearly maintenance plan.
The operation that maintenance is carried out with regard to day degree of the maintaining and dispatching ADMINISTRATION SUBSYSTEM of Fig. 7 key diagram 4.
Fig. 8 A-8D is the screen display result of layered directory of the components list file of Fig. 1.
The operation that the engineering change control and management subsystem of Fig. 9 key diagram 1 is carried out.
The operation of the engineering change control and management subsystem of Figure 10 and 11 key diagrams 1 for realizing that the described change of chart 9-13 is carried out.
Figure 12 illustrates the step that parts catalogue work is revised in good time.
The operation that an engineering change number is carried out is closed in Figure 13 explanation according to the present invention.
Figure 14 explanation is according to the whole zero service parts planning cycle of the present invention.
Figure 15 illustrates another example of automatic components list of the present invention.
Figure 16 illustrates the detail operations of replenishing the stock that the calculating of Figure 14 was adjusted by the time.
The maintenance operation planning of the maintaining and dispatching ADMINISTRATION SUBSYSTEM of table 1 key diagram 1 and the result of scheduling.
One example of the operation of table 2 key diagram 6.
Table 3-5 explanation is made an example of correction in good time in the operating period of Fig. 9 to the components list file.
Table 6 explanation is according to the layout of parts general act of the present invention.
Table 7 explanation is according to the layout of parts catalogue file of the present invention.
Table 8 explanation is according to the layout of engineering change announcement file of the present invention.
Table 9-13 should illustrate the operating period at Fig. 9, made an example that changes with the components list file.
Table 14 explanation is according to an example of an active service parts catalogue of the present invention.
One example of the operation of table 15-18 explanation Figure 16.
Now with reference to the accompanying drawings the present invention is done more fully to describe most preferred embodiment of the present invention shown in it.Yet the present invention can multiple different form implement, thereby be sure not to only limit to this regarding as at this embodiment that carries, and should think that providing embodiment makes the disclosure thoroughly complete, and give full expression to scope of the present invention, those skilled in the art can be understood.Same label is referring to identity element in full.
Foreword and summary
Referring now to Fig. 1, overall design and operation according to intelligent computer integrated maintenance system 1 of the present invention are described.The intelligent computer integrated maintenance system of Fig. 1 is designed to and one comprises that a computer integrated manufacturing system 10 of producing operation control 11 links operation.Yet these those skilled in the art should be understood that this system of the present invention can be used for controlling the maintenance of any " unit ", and unit specially refers to have the machine group of premiere feature and maintenance requirement.In the illustrated embodiments described here, this unit is many production lines.
Intelligent computer integrated maintenance system 1 of the present invention can with authorize people such as Beasley and transfer computer integrated manufacturing system 10 co-operatings described in assignee's of the present invention No. the 4th, 827,423, the device patent, this patent is quoted at this, to do reference.In people's such as Beasley patent, the detailed design and the operation of computer integrated manufacturing system 10 have been described.Particularly in people's such as Btasley patent, done detailed description, no longer described in detail at this corresponding to the design of the production operation controller 11 of " III level (Level III) " and " IV level (Level IV) " computing machine.
Intelligent computer integrated maintenance system 1 of the present invention comprises a maintenance operational computations machine controller 2, and it has 4 subsystems.These subsystems are: maintaining and dispatching ADMINISTRATION SUBSYSTEM 3, engineering change control and management subsystem 4, components list ADMINISTRATION SUBSYSTEM 5 and zero Parts Inventory ADMINISTRATION SUBSYSTEM 6.To describe each of these subsystems below in detail.Their operation can be summarized as follows:
Maintaining and dispatching subsystem 3 obtains the actual production and the planned production scheduling of this unit from total production scheduling file 13.The service time of intending the parts of maintenance and in predetermined period each parts is scheduled in predetermined period is all judged according to the scheduling that obtains.The maintaining and dispatching ADMINISTRATION SUBSYSTEM produces a planned production scheduling of assigning again and this scheduling is offered total production scheduling file 13.
The engineering change that engineering change control and management subsystem 4 holds in the maintaining and dispatching that is included in engineering change control documents 12.Thereby, existing maintenance of producing machine, engineering change is in the future dispatched intelligently according to this production machine.
Components list ADMINISTRATION SUBSYSTEM 5 is designed to comprise unit and produces the electronic storaging part list file 7 of layered directory of all parts of machine and operate in the lump.The parts catalogue not only comprises maintenance or easily worn part, and it comprises the complete list of the material of each production machine.Preferablely be the attached image of each bill of materials with the respective material inventory.For a typical machine, give 5-6 material level, highest level is the part number of entire machine, and the minimum level minimum field-replaceable unit layer that is this machine.
Zero Parts Inventory ADMINISTRATION SUBSYSTEM 6 is designed to and zero Parts Inventory file 8 co-operatings, orders goods and the stock to manage zero spare part.Zero Parts Inventory management system and components list ADMINISTRATION SUBSYSTEM 5 and 4 co-operatings of engineering change control management system are so that order goods according to the accurate parts catalogue in the components list file.As possible, do not order manufacturer's specific features and order general or substitute parts.Moreover the engineering change of expection is considered in stock control, makes the zero Parts Inventory of also failing to use reach Min..Zero Parts Inventory ADMINISTRATION SUBSYSTEM 6 is sent parts according to maintaining and dispatching ADMINISTRATION SUBSYSTEM 3 given maintaining and dispatchings and is ordered goods.General parts are normally ordered goods with the ordering point system, wherein when present storehouse quantity is lower than predetermined quantity, carries out the additives amount parts and order goods.By contrast, non-general parts are then ordered goods by part according to the maintenance that expection is intended carrying out.Thereby the stock of these parts reaches bottom line.
Those skilled in the art should be understood that maintaining operational computations machine controller 2 is preferably realized by the computer program with stored program computer work, and the module of subsystem 3,4,5,6 in maintenance operational computations machine, working.Yet those skilled in the art should be understood that also in subsystem 3,4,5 and 6 each can work in the computing machine that separates, and with a shared data bus interconnection.Components list file 7 and zero Parts Inventory file generally are to be stored on the known non-volatile storage device of magnetic or optical memory system or other.Those skilled in the art should be understood that also intelligent computer integrated maintenance system 1 can realize on the single computer system that has computer integrated manufacturing system 10 in producing 1 maintenance system.For a plurality of units, maintenance operational computations machine controller 2 generally is to use such as IBM 3090 principal computers to realize.Yet, to one or more subsystems or also available one or more personal computer of total system.
The detailed hardware and software design of intelligent computer integrated maintenance system of the present invention will be depended on other the known factor of those skilled in the art of the number of controlled unit and complicacy, the quantity of required function, the computer resource that has and some.Below can make those skilled in the art realize a kind of system that can combine to the description of intelligent computer integrated maintenance system with known computer integrated manufacturing system.
Summary: maintaining and dispatching ADMINISTRATION SUBSYSTEM 3
The present maintaining and dispatching ADMINISTRATION SUBSYSTEM 3(Fig. 1 that describes) operation overview.Maintenance operation is divided into two classes: plan and plan (urgent).Planless emergency maintenance betides a malfunctioning machine or produces in the product of inferior quality.A feature of the present invention is that planless maintenance operation can add system, and the maintenance of having planned the operation that scheduling is intended carrying out in predetermined period can realize during planless maintenance is carried out.In other words, when unit was stopped work because of planless maintenance activity, the maintenance of having planned that can carry out was simultaneously also carried out, so unit need not stopped work for the first time in the maintenance of having planned the operation that will carry out in the near future.
Planned maintenance can be " time dependence ", and no matter such as number when using, every three months changes once oil; Number during perhaps according to real work, " using interdependent " produced such as per 1500 and hour to be carried out visual examination.The another kind of form of planned maintenance is the maintenance improvement council (MIC) order as a major event, must upgrading such as a machine.
Routine scheduling (RS) maintenance file in the maintaining and dispatching ADMINISTRATION SUBSYSTEM 3 usefulness maintenance operational computations machine controller 2 comes the control time dependent event.The RS record is set up for each production machine, and the time distance of maintenance operation is incorporated in the RS record.This information is used for the time dependence incident in future was adjusted by the time.
Use dependent event to control by total maintaining and dispatching file 13.Number is kept by unit during real work.Following work hours according to the scheduling of having planned during from the schedule work of accumulative total unit number derive.This information is used for determining the following arrangement of time of using interdependent maintenance event.
The maintenance improvement council (MIC) order is the incident of being formulated by the engineering maintenance improvement council.These orders comprise that producing different product, machine upgrading, preventive maintenance test, machine overhaul or machines such as machine tune project such as leaves under order.The order of the maintenance improvement council is by the computer control of planned maintenance requirement input maintenance operation is established.The maintenance improvement council order that planned maintenance requires to be used for to future was adjusted by the time.
Those skilled in the art should be known in that unit is the common appointment person between maintenance and the production.In the embodiment in figure 1, carry out on a certain equipment of a unit as maintenance, then whole unit is just stopped work.According to the present invention, all planned maintenance operations are to make up by unit.In unit each is produced machine can have the different maintenance operations by the time adjustment to finish.According to the present invention, in order to reduce compressor emergency shutdown to greatest extent, these operations are coordinated, make multinomial maintenance operation carry out simultaneously.For example, the machine in unit may will maintain on specific Monday on schedule, and meanwhile, will carry out the preventive maintenance of adjusting by the time on next Wednesday with another machine of unit on schedule.According to the present invention, the maintenance that these two maintenance event are carried out by most critical reschedules.
Illustrating the work program of the step of every maintenance operation intending carrying out is made by the maintaining and dispatching ADMINISTRATION SUBSYSTEM.Extended by work program by time adjustment incident, calculated number when finishing every required by task man-hour, labourer's grade and machine down.Then the man-hour of adjusting by the time with weekly can be for making comparisons man-hour.Can be when may be defined as total maintenance man-hour number when multiply by weekly (maintain the employee number) deduct and be the time planless or that emergency maintenance kept.For example, one week was 40 hours if 10 employees carry out full-time maintenance activity, and 400 total maintenances hour then can be arranged weekly.If keep 40% for not planned maintenance emergency requirement, number when then the expression of 160 hours in 400 hours is not planned, and can supply scheduled events in 240 hours.
So, according to the key and production requirement of incident, reschedule making, and following situation take place: reschedule the shutdown of unit, so that can carry out the planned maintenance operation by the scheduled events of time adjustment.Maintaining and dispatching is delivered to total production scheduling file, and unit withdraws from existing activity in production.Maintenance requires to be unloaded to the computing machine in unit.(computing machine in the unit has description in above-mentioned people's such as Beasley patent).Maintenance requires also to be used for writing down planless or the emergency maintenance operation.The planned maintenance incident can not plan in machine down/is achieved during emergency maintenance.According to the present invention, planned maintenance carries out when compressor emergency shutdown, and the utilization factor of whole unit is improved.The planned maintenance of adjusting by the time adds that the movable reservation of planned maintenance is not extended man-hour by the hour man-hour, maintains budget computation year.
The maintenance operation plan of table 1 explanation maintaining and dispatching ADMINISTRATION SUBSYSTEM 3 and the result of scheduling.As shown in table 1, it is that number is a basic calculation during by each all man-hour and machine that time dependence maintenance requires.Number also calculates according to total production scheduling file 13 when using interdependent man-hour and machine.Number calculated when the order of the maintenance improvement council changed also by man-hour and machine.So the required amount of work of number was calculated with each week during by man-hour and machine.Required amount of work is made comparisons with the time number that can supply again.Should be appreciated that, when total number be included as planned maintenance not and keep 40%.Deduct and just draw number can be for scheduling remaining the time keep for the time number of planned maintenance not.As shown in table 1, number can supply planned maintenance when supposing to have 10 man-hours and 10 machines.Can see that the workload shortage in 1 man-hour was arranged in the 1st week, 7 man-hours and the shortage of 2 machine hour were arranged in the 4th week, and 10 man-hours and the shortage of 7 machine hour were arranged in the 26th week.
So according to the present invention, maintenance requires to readjust in such a way, promptly number reschedules to mediate this shortage when man-hour and machine.The explanation in table 1 that " reschedules operation ".In operation (a), 4 workload shortage in man-hour in the 4th week were moved to for the 3rd week.In operation (b), 1 workload shortage in man-hour in the 1st week moved on to for the 2nd week in the lump together with the remaining shortage in 3 hours of the 4th week.In operation (c), count shortage from the 4th week being moved to for the 3rd week during 2 hours machine.In operation (d), the workload shortage was moved to for the 25th week during 6 hourly workers in the 26th week.In operation (e), the 26th week workload shortage in 4 hours was moved to for the 28th week.In operation (f), the machine hour workload shortage in the 26th 6 hours weeks was moved to for the 25th week.At last, in operation (g), count the workload shortage during 1 hour machine in the 26th week and be moved to for the 27th week, and all maintenances require to be changed due date the time that reschedules to meet.Thereby by rearranging maintenance event, all planned maintenances and production can existing resource be adjusted.
Summary: components list ADMINISTRATION SUBSYSTEM 5
The equipment supplier generally provides the parts handbook of every equipment that they sell.The catalogue that this parts handbook comprises engineering drawing and is used for all parts of equipment, and the assembling of devices illustrated.Maintain or engineering change as plan, this parts handbook is exactly important reference information.
Components list file 7(Fig. 1 of the present invention) is a kind of material explanation inventory of supplier's components list.The components list file is organized all supplier's parts handbooks with regard to a particular rack.This just provides the multi-level bill of materials for the equipment in each unit.Fig. 2 is the components list file example of the unit of board 86-4A-1 by name.
With reference to Fig. 2, should see that all parts of forming an equipment remain in the components list file, be not only those rapid wears and maintenance parts.Thereby the components list literature kit is contained in a layered directory of all parts of each machine in a plurality of production units.As will be described, to each level of the parts in the components list file, preferable be attached with the drawing illustrate of the intercoordination of these parts.
Form an equipment and be included in all parts in the components list file, can be divided into four classes: rapid wear, removable, general and stock not.Easily worn part is those parts that consume in process of production, does not require to produce in the catalog of materials of a product but do not remain on.Its some examples such as fishing dies, the roll coil of strip and cutting knife.Because this base part must be changed in loss or after using up.
They are listed in component items in the components list file.According to the present invention, numeral system was fixed when the zero service parts planning of easily worn part was the future work of determining according to maintaining and dispatching ADMINISTRATION SUBSYSTEM 3.For example, the roll coil of strip is to produce at each to be changed when order of classes or grades at school begins.Therefore, each unit of being dispatched must have a cover roll coil of strip of being produced the order of classes or grades at school use for dispatching.The roll coil of strip that the supply plan dispatching office needs add up to every day, weekly or every month required roll coil of strip number get ready.
Field-replaceable unit is that those have longer life but parts that certainly will will wear and tear and break down.Its example such as fan, motor, axle and driving wheel.It mainly is failure rate averaging time that machine suppliers provides that these parts all have.And these suppliers also are the suppliers who changes parts.According to the present invention, during the real work of these parts number and in the future work hours be to determine by total production scheduling file, and with averaging time failure rate make comparisons, to determine to estimate part replacement.Be replaced as these parts, running time is with regard to return-to-zero, and integration period is restarted.Be omitted in the parts history file that field-replaceable unit information (for example comprise, unit equipment number, maintenance require number, accumulative hours and other relevant datas) will be mentioned below.To the parts of this unit is applied statistics analytical review its of failure rate averaging time, and it is examined and correct when needed.If the failure rate that does not have supplier to provide just calculates history failure rate averaging time according to the parts historical information.The components list file also provide still be in supplier the guarantee period in the information of relevant replacing parts.Number was with the comparison of making guarantee when reservation supplier assured date and/or guarantee.
General parts be those many machines all use comprise parts such as nut, bolt and packing ring etc.These parts keep in batch and send when needed.On the books in the components list file, be made for reference.
Stock's parts do not comprise that frame, gate and other can not need the parts changed because of breaking down or maintaining.These parts are on the books in the components list file, are made for reference.
On that the engineering drawing that supplier provides or " exploded view " are stored in the magnetic related with the corresponding component catalogue in the component files with graphic form or other carriers.This just can make maintenance personal or maintenance personnel can the parts of specific pattern be claimed, or requires specific features catalogue and figure.
Part number in the components list file to general parts or may the time miscellaneous part also number defined reference to supplier's part number and internal-corporate part number, zero Parts Inventory Account Dept piece number and industry standard part.Moreover the components list file can show multi-level parts catalogue, " parts use location " information, gathers the parts catalogue and announce relevant engineering drawing and/or assembly with pending engineering change.Components list file 7 remains on a center and can distribute.One copy can offer each unit, and this unit only is included in those the special production machines of configuration that find in the unit.This copy can be included in the accessible personal computer of the haul distance with CD-ROM.
Those skilled in the art should be understood that in some cases, must purchase field-replaceable unit in the past at the components list file modification sometimes.For example, in the high upgrading program of efficient, to changing the parts judge, can before revising the order of unit, decision carry out for change.Another example is to obtain the GREV changed, but engineering drawing is not arranged as yet.In these two row, " material planning inventory " provides a kind of method to change parts and relevant change program is made arrangement of time to judge.Engineering department can not revise the components list file and draft engineering change plan inventory.
The plan inventory is the inventory planning in order to assessment machine change and new machine part.For example, if the upgrading of a machine requires with 50 new parts then can to draw up the plan inventory of 40 worn parts changing these machine difference parts to change 40 worn parts of this machine different parts.But the plan subscription rate with and the suggestion of several implementation plans proposed.The delivery that the plan inventory can be used to dispatch the parts of adjusting by the time.Out-of-date parts, i.e. those parts to be replaced, inventory is eliminated according to plan.Below describe and control the actual execution of finishing this planning by engineering change by the components list file.The plan inventory is i.e. cancellation after finishing this planning.
Summary: engineering change control and management subsystem 4
Engineering change control and management subsystem 4(Fig. 1), keep components list file 7 with the engineering change controlled step.According to one of " validity " control technology as described below, at the components list file engineering drawing and parts catalogue are added and to be changed, or therefrom cancellation.
The most generally the validity control technology of Shi Yonging is " specific date ", and for example, April 15, components A will be replaced by part B.Another validity control technology is " zero Parts Inventory uses up ".By this technology,, just send part B when components A no longer possesses.ECN control will guarantee that components A can not ordered goods again.Validity control also can require " serial number " to link mutually with maintenance.When this technology of use, a specific change promptly requires given serial number to begin to carry out from maintenance, is performed in all maintenance requirements in succession then.
Engineering change control is that the equipment change ditch is led to the production scene.When requiring equipment change, the components list file is just by inject figure and/or parts, change or cancel and revising in good time.The engineering change control procedure is to carry out already in the change that requires, and the maintenance relevant with this change requires to have finished just calculation end.
The engineering change procedure declaration is in Fig. 3.As shown in Figure 3, the components A in unit 86-4A-1 is intended changing with part B according to engineering change control No.123.Maintenance requires * * * number be to be carried out for unit 86-4A-1 by from zero Parts Inventory, sending part B.When maintenance require * * * number be closed, meaning is promptly worked and is finished, engineering change control also is closed for No. 123, and the components list file is revised with reflection engineering change control in good time and finished for No. 123.The in good time correction of components list file comprises that the bill of materials and image all are sent to this factory that has the machine of doing in good time correction already.
Summary: zero Parts Inventory ADMINISTRATION SUBSYSTEM 6
The order of zero Parts Inventory ADMINISTRATION SUBSYSTEM, 6 controls, zero spare part.According to the present invention, general parts are that " ordering point " system that uses orders goods as nut, bolt and packing ring etc.In other words, when quantity on hand drops to predetermined ordering point when following, then sending replenishes orders goods to reach standard order quantity.
The management of field-replaceable unit is a technology of using the demand of adjusting by the time.Planning cycle was made up of three steps.At first, calculate the component demand of adjusting by the time.These demands are from three aspects: the required parts of adjusting by the time for supply of maintenance requirement, the parts of plan inventory defined and owing to surpass the parts of the parts expection of failure rate averaging time and replenish.The parts of expection replenish the current production schedule get each unit and the classification declaration by the self-winding parts table extends plan.Planned go into operation weekly the time number when being added to actual going into operation in the number.Propose a requirement then, in parts be about to surpass this week of its of failure rate, give return-to-zero averaging time.Requirement is changed in this expection that just produces all units, is gathered the sum of the replacing requirement of adjusting by the time of deriving parts thus.The requirement of adjusting by the time consumes the stock in present storehouse, up to using up.From depositing, present Kuku deducts when sending this zero spare part in order to the zero spare part of supplying planless maintenance.Can make system than ordering goods sooner in the original plan to replenishing of these zero spare parts.
At last, if parts will be kept down, then its order that replenishes is to its surplus that need exceed present storehouse or send in each week of safety inventories amount.The order that replenishes can require the pre-set time of a predetermined number of days before of this parts delivery to issue supplier according to supplier.All parts that need offer maintenance requirement, plan inventory and replacing parts are added in the sum of drafting goods together with definite each zero spare part.This system also can produce the list or the form of these parts, or the electricity consumption submode is ordered goods to these parts.
As use components list file of the present invention, maintenance personal can squeeze into the concrete machine group number and the parts layered directory of browsing, up to demonstrating needed component diagram.Selected the parts that he wants as the maintenance personal, computing machine can convert this selection to zero Parts Inventory system number, and demonstrates in the existing quantity of article from the store rooms in this maintenance personal's workshop.If stock quantity can meet the demands, the maintenance personal just sends these parts immediately and is applied in the maintenance requirement.If quantity is not enough, the maintenance personal can require from central division part activity or other workshops to reinforce parts, and these parts are implemented in the corresponding maintenance requirement goes.When transferring parts, these parts are issued this maintenance requirement.
Should point out that according to the present invention, the maintenance personal allows to choose any one deck of components list file hierarchical level.Thereby if for example the maintenance personal knows machine number, he can squeeze into this number and begin to browse this point in the components list file.Moreover component diagram can be printed.
Operation is described in detail: maintaining and dispatching ADMINISTRATION SUBSYSTEM 3
Maintaining and dispatching ADMINISTRATION SUBSYSTEM 3(Fig. 1) maintenance of total production scheduling in total production scheduling file 13 and unit is required to combine, revise total production scheduling file and total maintaining and dispatching file 9 thereby produce.The result of this combination draws all movable integrated dispatchs that carry out on a unit.An activity can be the production of a member, or the maintenance of conventional scheduling operation.Production operation controller 11 is in 13 times operations of total production scheduling file.For in unit existing production capacity scope, satisfying production requirement, each unit is made adjustment.Maintaining and dispatching subsystem 3 produces total maintaining and dispatching file 9, comprising the maintenance project of each unit to support total production scheduling.
Referring now to Fig. 4, maintaining and dispatching ADMINISTRATION SUBSYSTEM 3 is adjusted operation by three times.At first, for equipment implement and the configuration change is formulated maintenance project at a specified future date at square frame 20, it two makes maintenance project and budget then at square frame 21.Last adjustment is the scheduling of day degree maintenance activity, makes in square frame 22.Each of these adjustment is illustrated below.
The function of maintaining and dispatching ADMINISTRATION SUBSYSTEM is with maintenance project open circuit at a specified future date.For operating among Fig. 5 of carrying out of maintenance project 20 at a specified future date illustrates.Forward planning program can be undertaken by the phase in four seasons with regard to 1 to 10 yearly plan prospect.Obtain tactful business plan (square frame 25) and obtain the current unit productive capacity (square frame 26) of first unit.100% specified unit productive capacity is with speed, day produces hour and producing days in this phase in season becomes.This productive capacity adopts efficient and utilization factor is adjusted.Efficiently be used for reducing productive capacity to take product structure, partial operation adjustment and special going into operation into account.Utilization factor is to be used for keeping the need of productive capacity for overhaul, change and other maintenance function.
Relatively be by assigning each product to carry out at square frame 29, dispatching (square frame 27) up to all products to the unit that can produce this product.Those skilled in the art should know that multinomial product generally can be produced in each unit.According in the date of expiration which product of which unit preferentially goes into operation and this product can be scheduled, determine the prediction of productive capacity restriction.Do not have restriction if see productive capacity, meaning is that product can be dispatched (square frame 30), then finishes the adjustment first of maintenance project at a specified future date, and looks into the indication of the surplus productive capacity (if any) of Suo Yongyou at square frame 36.
If productive capacity is short (square frame 30), then the productive capacity restriction is formulated at square frame 31.If overtime work can solve the restriction (square frame 32) of productive capacity, just the plan of making is also made comparisons to the productive capacity demand once more.If do not have ability overtime work (square frame 32), second walking is moving to be the productive capacity that improves unit.It is efficient providing unit more effective use by improving unit at square frame 33, and/or increases production by the use chance that improves unit to improve the maintenance operation.The maintenance project personnel can indicate minimum/optimum rate of utilization and come unit is adjusted.Maintenance project function at a specified future date will be at instructional criterion with interior change utilization factor (square frame 34), and the productive capacity demand is made comparisons again.
Can not solve productive capacity demand (square frame 35) if improve the machinery utilization rate, the 3rd step was that required productive capacity and other unit surplus productive capacity are made comparisons square frame 37.Analyze the trend at a specified future date of other unit and select those and can be changed to produce the unit of required product at square frame 38.Then, draw up the maintenance requirement, if, just carry out change so that take place last year in the plan prospect at square frame 39.
More than three alternativess all products are all carried out, up to all products obtain the scheduling (square frame 27).So, process just finish (square frame 28).If these three restrictions that alternatives can not solve productive capacity then can be drawn up investment analysis, to recommend to buy additional machine.
The production of machinery ability file of drawing up at square frame 38 of having changed offers production operation controller 11(Fig. 1), be used to draw up the production schedule.It is to match mutually with the production of machinery ability file of having changed that the maintenance of drawing up at square frame 39 requires with the change of carrying out unit.This is to produce the first step that combines with maintenance.Kept the stop time of unit change when the production operation controller is drafted the production schedule.
Refer again to Fig. 4, second operation that maintaining and dispatching ADMINISTRATION SUBSYSTEM 3 is carried out is yearly maintenance plan 21.The maintaining and dispatching weekly in 1 year of plan prospect is drawn up in the yearly maintenance plan.Maintenance project at a specified future date keeps unit with utilization factor number percent; For example keeping unit time of 10% is used for the maintenance operation.Utilization factor number percent is replaced by the yearly maintenance plan.
Referring now to Fig. 6 the detail operations that yearly maintenance plan function 21 is carried out is described.The purpose of this function is that all known maintenances of unit are required to combine.The maintenance requirement can be from the unit change (Fig. 5) of: (1) first phase plan; (2) according to the maintenance such as the time dependence of incidents such as changing oil of routine scheduling; (3) maintenance improvement council order is such as test, change and upgrading; And (4) interdependent maintenance function of use of number when going into operation according to the plan of each unit.The maintenance requirement of unit do change, time dependence incident and maintenance council command in combination together.In case combination finishes, the maintenance requirement will reschedule, so that the maximum stop time that limits the minimizing unit.Use interdependent maintenance requirement to be drawn up and require also together with other maintenances.
With reference to Fig. 6 A, the time dependence maintenance requires to draw up (square frame 41) at square frame 44 by the file of reading conventional scheduling.This literature kit is contained in the conventional record of the time dependence incident of each form that plan is carried out on every equipment.These incidents can require equipment downtime-change oil, add machine oil or change belt.Other incident is in still on-stream visual examination and the device analysis of carrying out of equipment.Read its survey record at square frame 42 for each conventional dispatching record, with derive that this incident takes place the time apart from (square frame 43).In preceding 52 weeks of plan prospect, draw up a planned maintenance requirement for every time dependence incident at square frame 44.
Test, change and the device upgrade order of the maintenance improvement council are imported by this council, and obtain at square frame 45.To withdraw from production as unit and quite grow one period, then the use of total production scheduling retaining device.At square frame 46, the unit change of producing first phase proposition requires to require also together with other planned maintenance.
With reference to square frame 47, the order and the unit change that the maintenance of time dependence are required, maintains the improvement council are all made up by unit.Refer again to square frame 48, each maintenance of unit requires to assign again, so that reduce the loss of time because of maintenance to greatest extent.Each maintenance requires to have a key mark, the order that it specifies the maintenance operation to carry out.Each maintenance requires (window) also for some time, in the meantime, must carry out this maintenance requirement.The date of each maintenance requirement plan is all checked, so that non-key maintenance requires to require to combine with other maintenances.Maintenance requires all to be dispatched, so that bottom line subtracts the big compressor emergency shutdown time.
Referring now to Fig. 6 C, the detail operations (square frame 48 of Fig. 7 A) of assigning maintenance to require again in order to reduce the production time loss is to greatest extent described.Shown in square frame 81, maintenance requires combination at first by date.So, at square frame 82, the maintenance that is detected is required to be checked, require pairing mutually to determine whether they can reschedule with other maintenance.This step is performed until all maintenances and requires to be checked through (square frame 83).Reschedule is for satisfying the maintenance requirement of most critical.Specifically, each maintenance requirement can comprise a maintenance requirement fate that can reschedule or all numbers and still satisfy the maintenance purpose.Square frame 48 is checked remaining maintenance requirement, sees whether they can satisfy maintenance purpose aspect fate or all numbers.The maintenance that can reschedule has one on temporary scheduling date that square frame 85 calculates.When all maintenances require all to handle, check once more that at square frame 86 maintenance requires so that the scheduling of additional row again.Conduct a survey at square frame 87, see that can scheduling maintenance requirement produce the loss that reduces the production time to greatest extent again.Square frame 86 is done it again,, require the date to do to revise in 88 pairs of maintenances that reschedule of square frame at last in good time to check additional scheduling again.
For example, suppose to plan the change of a unit in the 20th week.For this same unit requires several time dependence maintenance operations.One the maintenance operation scheduling the 18th the week and another is in the 21st week.These time dependences maintenance operation can be carried out in former two weeks that require the date.This two time dependences maintenance operation will reschedule in the 20th week.In order to reduce the loss of time to greatest extent, this two time dependences maintenance operation will be achieved during the compressor emergency shutdown change.
Refer again to Fig. 6 A, planned maintenance requires by total production scheduling by using dependent event to draw up.Use dependent event to occur in an equipment and established regularly number of product one.Number when number adds that plan goes into operation during according to actual the going into operation of accumulation carries out several preventive maintenance operations at this equipment.Total production scheduling is made scheduling, and a compressor emergency shutdown is to use dependent event.Use being calculated as follows of dependent event:
Number was added up (square frame 49) when (1) unit had gone into operation actual production.During the production of this week number be added to actual when (Life-Lto-date) number.
(2) time of changing of execution time interdependent maintenance operation, maintenance improvement council's order and unit, from can removing for the productive capacity of producing, and the productive capacity that can supply reschedules at square frame 52 and draws up at square frame 51.
(3) production demand is after holding the maintenance requirement, according to being added to this unit (square frame 54) for productive capacity.
Number when number was added to actual ending then when (4) plan went into operation.At square frame 56, number surpasses a use dependent event (for example: per 1250 produce hourages does the overhaul of an A level) when the prediction plan goes into operation, and just draws up a maintenance and requires (square frame 57).
(5) date of using interdependent maintenance to require requires the date to match mutually with other maintenances subsequently.Do not use the date of interdependent maintenance requirement promptly to close production if unit is dispatched to, this requirement reschedules at square frame 58 and makes it be carried out (square frame 59) when unit does not use.If produce is to require in a week that requires to maintain, just check to determine to move on to production the unit of free time.If this production requirement can not be satisfied, reschedule the maintenance requirement.Production requirement and maintenance require to rearrange to meet new scheduling at square frame 53.
Above process is carried out repeatedly, till requiring to have one to assign the scheduling date in square frame 55 all maintenances.New maintenance demand file is drawn up at square frame 60.The production of machinery ability also kept already, to carry out planned maintenance.
Next step is to derive to maintain to require required estimation man-hour, and the derivation of man-hour requirement has two kinds of methods.Man-hour requirement can directly be added to the maintenance requirement.Other method, as shown in Figure 7, the maintaining and dispatching personnel can indicate the attached work program that requires with detailed man-hour at square frame 61.Require to continue period according to the from date of maintenance requirement with the maintenance that the date of expiry shows, man-hour, prospect workman's class shape was weekly added up according to plan, shown in square frame 62.
This carries out all maintenances with regard to generation and requires required man-hour (square frame 63).Can supply man-hour weekly (deduct during the chief engineer to planned maintenance is not current and keep man-hour), draw at square frame 64, and make comparisons with requiring man-hour weekly.Production scheduling also obtains at square frame 65.Relate to the correction of robotization right of priority so as to make maintenance operation with can be for the time limited dispatching technique of balance in addition, in order to solving all overladen each weeks, and reschedule maintenance at square frame 66.Each maintenance requires keyly to make inspection with regard to it.Non-key maintenance requires to be rescheduled, to be filled with surplus each week in man-hour.This dispatches the production scheduling that is obtained by square frame 65 again and screens, to guarantee to reduce to greatest extent the influence to stock's policy.Consequently produce a new maintaining and dispatching (square frame 67) and new production scheduling (square frame 68).Promptly obtain holistic plan weekly now.
Example: yearly maintenance plan
Example referring now to 6 processing of table 2 key diagram.With reference to Fig. 6 and Biao 2A, the first step is gone bail for to support and is improved the known maintenance requirement that season person can order (square frame 45) and time dependence incident (square frame 44), and they are inserted production scheduling, replaces productive capacity.The tissue of time dependence maintenance event and the maintaining of maintenance improvement council order of the scheduling of table 2A explanation routine by week.Table 2A also illustrates the time dependence maintenance is required to insert the unit production scheduling.
According to the square frame 51 of Fig. 6,, be the interdependent maintenance requirement of use of calculating with " P/M " expression at table next step shown in 2B.The time number of scheduling is added to the time ( square frame 49 and 50 of Fig. 6) that actual time, number must be drawn up a maintenance requirement with prediction.For example, unit 1A-1 before the 1st week, have 800 actual time number, then drafted one and maintain requirement at 1250 hours.Equal a week scheduling goes into operation the time number (every production week 112 hours) to be added to the actual time numerical table bright, unit 1A-1 is reaching 1250 maintenance points the 4th week.Interim maintenance requires to use interdependent maintenance to work as dispatcher in the 4th week by carrying out.
Referring now to table 2C, be maintenance to be required all and together corresponding to its 3rd step of the square frame 51 of Fig. 6, to reduce stop time to greatest extent.For example, with reference to chart 2C, the maintenance of a time dependent event requires the maintenance of (MR3 in the 4th week) and a time dependent event to require (MR9 in the 7th week) two-phase to merge, and is rescheduled to 5th week of unit during the free time.Production is lower than below the 4th all desired inventory objectives.Rescheduling that maintenance requires reaches the purpose of producing and maintaining.Machine unit scheduling (square frame 54) and new MR file (square frame 60) are in table 2C explanation.
Corresponding to the square frame 61-66 of Fig. 6, final step be desired man-hour with can with reference to chart 2D, can guarantee to carry out weekly only two maintenance operations for balance in addition in man-hour.Three maintenance operations of having dispatched were arranged in the 5th week.Unit 3A-1 is the optimal selection that reschedules, because do not dispatch production in the 6th week.Yet, three maintenance operations were arranged in the 6th week subsequently.For the maintenance that makes 3A-1 can move on to for the 6th week, the maintenance of unit 3A-2 operation will move for the 7th week.Maintenance that draws (square frame 67) and production scheduling (square frame 68) result are in table 2D explanation.
Per diem maintaining and dispatching 22
Refer again to Fig. 4, the last adjustment that maintaining and dispatching ADMINISTRATION SUBSYSTEM 3 is carried out is a maintaining and dispatching 22 per diem.Per diem maintaining and dispatching is drawn up comprehensively per diem production/maintaining and dispatching.In the past adjust (yearly maintenance plan) in whole plan prospect, all combining by the week maintenance and the production schedule.Per diem maintaining and dispatching is converting per diem maintaining and dispatching to by all maintenance projects.
Maintenance requires most actual dates that maintenance event is arranged generation.Its example is as maintenance improvement council's order and machine change.Time dependence and the interdependent maintenance event of use can betide this all any given day that they are planned.Last group maintenance requirement of intending combination is those visual examinations and the discoverer of electronic sensing device institute.Fig. 7 illustrates the aggregation process that these maintenances require.
The time dependence incident of visual examination can disclose potential equipment failure.The result of this visual examination obtains at square frame 71.Electronic sensing device also can be placed on crucial apparatus assembly.Adopt statistical process control technology (SPC) to catch and assess the state of key equipment assembly.Reading is belonged to the tolerable limit just holds fire with interior.From the input of visual examination explanation and statistical Process Control, produce diagnostic datas at square frame 72 to the reading beyond each tolerance range.Diagnostic data can have knowledge base in square frame 73 usefulness and be assessed with the expert system of carrying out deagnostic test.If do not predict fault (square frame 74), just process finishes at square frame 75.If doped a fault, then the source of trouble is identified, determine the fault date, and assign a key mark in order to scheduling.Step is merged at square frame 77 and 78 respectively with new maintaining and dispatching (square frame 67 of Fig. 6) and new production scheduling (square frame 68 of Fig. 6) in the maintenance requirement that square frame 76 produces thus, and draws up per diem maintaining and dispatching at square frame 79.
Per diem maintaining and dispatching is being processed processing by week plan function among above-mentioned Fig. 6.The maintenance requirement of time dependence and use dependent event can be dispatched any given day in it expires this week of carrying out.The order of the maintenance improvement council can have the concrete Start Date that must act accordingly; Other can be dispatched to they overdue should be in week.Maintenance with predetermined Start Date requires to be dispatched.Other maintenances require to dispatch with the machine burden technology subsequently.This process comprises finds out the production instruction with due date.The maintenance operation will be around supporting the necessary particular machine demand of production task to dispatch.
More particularly, at square frame 89, all production is instructed and is required all to be gathered from the square frame 67 of Fig. 6 B and 68 maintenance.Then, the right of priority that goes into operation of taking time and assigning special producing to instruct according to the due date of producing instruction and for this instruction production at square frame 90.Check at square frame 91 by their new date so produce instruction, and dispatch the production equipment that the special producing instruction will take at square frame 92.The special maintenance requirement that must in framework sometime, carry out in square frame 93 scheduling subsequently.At last, remaining maintenance is required just to supply service time (when man-hour and machine) to be dispatched, and remaining non-key production instruction is adjusted subsequently at square frame 94.
Operation is described in detail: components list ADMINISTRATION SUBSYSTEM 5
Produce unit for one many machines are arranged.Each machine has the parts handbook of its assembly of explanation, and comprises a parts catalogue or claim " bill of materials " of each assembly.The parts handbook stores and remains on (Fig. 1) in the components list ADMINISTRATION SUBSYSTEM 5 in the electronics mode.Engineering drawing converts digital form to and figure is stored in components list file 7.Be stored in to assembly structure and parts catalogue components list file 7.Each assembly has image correspondingly.Assembly is pressed the layered directory layout.It shown in Fig. 8 A-8D the layered directory in the explanation components list file.
If import single production line sign, as workshop, unit and machine group number, just the components list ADMINISTRATION SUBSYSTEM is listed the assembly or the component list of this part equipment.The maintenance personnel can import concrete device id, and self-winding parts table ADMINISTRATION SUBSYSTEM will be put initial at this.For example, if the maintenance personnel imports workshop, unit and unit, display screen is with regard to displayed map 8A.The left side that shows is the image of the unit selected.The upper right side is the catalogue of all parts of unit, i.e. next hierarchical level of machine assembly level.The components list file is withdrawed from for user's information that gets help in the lower right, perhaps sees the bill of materials (below illustrate) of complete no accompanying drawing elephant.
The maintenance personnel selects next part equipment to consult subsequently.Shown in Fig. 8 A, selected packaging machine, display screen just illustrates Fig. 8 B.Packaging machine has 8 segmentations.The image of its each segmentation is shown in the left side of shown Fig. 8 B.The upper right side is the parts catalogue.The lower right comprises above-mentioned " help ", " withdrawing from " reaches " decomposition inventory " option.Option also can show detailed information (Chu Ru company part number, unit type or change historical) but the higher level of carriage return master classification, printablely go out image or list a new assembly in.
If the maintenance personnel selects option " 1-FRAME SECT10N 1 ", computing machine is with regard to next level of display device, shown in Fig. 8 C.If the maintenance personnel selects option 1-part 0051, the last assembly of this section occurs on computers together with parts catalogue (Fig. 8 D).This is the minimum level in the parts layered directory.But maintenance personnel's alternative pack is promptly put one " P " on the parts next door that shows, these parts will automatically be ordered goods, and assigns an emergency maintenance requirement number, unless this is a change of having planned, and the components list file will be revised the parts of changing with reflection in good time.To describe as following, the components list ADMINISTRATION SUBSYSTEM cooperates with zero Parts Inventory management system, to consult existing parts and automatically to send desired parts.The components list ADMINISTRATION SUBSYSTEM also cooperates with above said maintaining and dispatching management system.Planned and planless maintenance require all to carry out by the components list ADMINISTRATION SUBSYSTEM.
Engineering Service department preserves the originally main of components list file.The granting of the components list file of the equipment that can have the workshop this, offer respectively this workshop.Be added in main change originally and be transferred to the workshop in full via the electronics mode.On the other hand, can establish CD-ROM on personal computer uses for remote.
Engineering Service department can judge this change earlier before the change date will be changed or know to definite that unit.Engineering Service portion can draw up with changing relevant parts catalogue by a plan partial model and need not change and particular rack associated.Specify when the unit and the date of change, this plan partial model is duplicated to this particular rack.This just can make zero service parts planning earlier before the enforcement scheduling is included in the maintenance operation in workshop in.The plan partial model also has the ability that cost effectiveness analysis is carried out in the change of proposing.
Components list file and components list ADMINISTRATION SUBSYSTEM can be with commercially available imaging system such as Wang, and Wang An group picture system (Wlls) that Lowell, MA sell realizes.
Operation is described in detail: engineering change control and management subsystem 4
All changes to the components list file are controlled (Fig. 1) by engineering change control and management subsystem 4.With reference to Fig. 9, the detail operations of engineering change control and management subsystem is described now.An engineering change number (ECN) is all assigned in every change of components list file.The criterion of carrying out this change is also assigned engineering change number as a date.All permanent changes to the components list file are coordinated by Center Project change control (ECC) function.Iterim Change can be made to the shop test change in each workshop.It is short that these change terms of validity, and will cancel automatically, for example after 10 working days.If the shop test change will become the permanent Center Project that just must be delivered to and change control (ECC).
For carry out maintenance that change sends require with give with engineering change number (ECN) be reference number.The components list file is finished the work and is closed maintenance when requiring in maintenance, revises in good time.Engineering change number is closed when all changes are finished under ECN control.The emergency maintenance of carrying out on an equipment is delivered to Engineering Service portion for consulting through seizure.According to its effect the components list file is revised in good time.
Engineering change control is divided into two stages.Identify a change and change into the phase one with components list file coordination this project.Close engineering change and this change give with the components list file be subordinate phase.Referring now to Figure 11, in the phase one, all permanent changes to the components list file (square frame 108) all add to originally main after finishing ECN, and are distributed to workshop (square frame 111).Change requires from several aspects: (1) maintenance improvement council/supplier's instruction (square frame 101)-change such as the device design of an efficient upgrading; (2) workshop engineering change (square frame 102)-execution maintenance personnel's recommendation on improvement; (3) zero Parts Inventory control (square frame 103)-parts replace and change; And (4) carry out emergency maintenance (square frame 104).
An Engineering Service group of being coordinated its all engineering changes by engineering change control and management subsystem 4 is all delivered in these changes.Engineering change control and management subsystem 4 can be operated by Engineering Service portion, to add parts, leave out parts or to change parts.The first step is to add an engineering change announcement at the ECN file, changes the criterion that is achieved to draw up an engineering change and to set up.Next step, at square frame 108, change components list file is with reflection engineering change-add, leave out or change parts (or several).
The new part classification of adding the components list file is " wouldn't use ", and will not come across the components list file and number be assigned until an engineering change.When engineering change number is assigned, leaving out like this of parts identified.Change parts the operation of two steps is arranged: (1) leaves out the forepiece of working as of intending replacing; (2) add the replacing parts.
Example: the in good time correction of components list file
Table 3 shows two examples that engineering change control (Fig. 9, square frame 106) and components list (Fig. 9, square frame 108) are revised in good time.First example of table 3 is an example with figure number 0051.01.Engineering change number 1010 these figure of expression intend leaving out (1010D), and by 0051.01.01(1010A) replace at 2/10/XX.Figure number 0051.01 will be used before 2/10/XX.Figure 0051.01.01 will bring into use at 2/10/XX.Table 3 second example is an example with a part replacement.Ignition distributor 4030 will replace at 2/5/XX by 4030.01, by engineering change number 1011 controls.Ignition distributor 4030 must be at 2/5/XX(1011D) use before.Ignition distributor 40300.1 will be at 2/5/XX(1011A) bring into use.Figure 13 is presented at the effective parts catalogue of 2/5/XX.Figure 14 shows that this identical parts catalogue is still effective at 2/10/XX.In table 3,4 and 5 parts catalogue, according to the criterion of each engineering change number three kinds of different parts catalogues of interim expression a section time.
Table 3,4 and 5 example are unit 01 unit 01.This same engineering change number can be in order to change multinomial unit simultaneously.Yet each unit must have an independent engineering change number and change so that adjust by the time.
Close engineering change number and the subordinate phase that the components list file is control is delivered in change.Square frame 107 with reference to Fig. 9.The information flow of closing engineering change number is shown in Fig. 9.Below be four methods of closing engineering change number.
(1) Engineering Service portion can close engineering change number (square frame 107) under demand.When this incident is given birth to, the change of engineering change number expression will be delivered in the components list file.
(square frame 110) will close interim workshop engineering change number when (2) one shop tests changes is finished.The change of expression will be left out from the components list file (square frame 111) in workshop in the interim trial change.By the input of Engineering Service portion, the master of components list file originally will do to revise in good time as the shop test change.
(3) finish a maintenance and require (square frame 113 and 117), will close an engineering change number.This can send a maintenance in maintenance and require when carrying out maintenance improvement council's order (square frame 113) or take place when carrying out emergency maintenance (square frame 117).Notice Engineering Service portion in the time of will excluding the components list file changing parts.
(4) use up relevant engineering change number when zero spare part (square frame 115) sends last parts (square frame 116) with material (parts), closed.This will be at following detailed description.
Describe in detail: the database file structure
After the detail operations that engineering change control and management subsystem 4 and components list ADMINISTRATION SUBSYSTEM 5 have been described, the data file structure of associated data files is described now.These files are engineering change control documents 112 and components list file 7.Components list file 7 has three files: parts master file, parts image file and parts catalogue file are described as follows.
(1) layout of parts master file-this file is shown in table 6, comprising following several respects:
* the supplier's part number that provides in part number-supplier or the supplier's parts overview.
* the name of an article-supplier's name of an article.
* state-A: effectively
I: temporarily need not
O: out-of-date
* image address-particular location of the image of engineering drawing in the image of component file.
* date that changes data change-image last time last time
* only internal-corporate part number of XYZ part number-these parts.Different suppliers can be with identical internal-corporate parts.
* replacement/replacing
The internal part of the current internal part of XYZ part number-during material uses up, will replace number.
* this change number is authorized in ECN number-engineering change.
* ECN action-S: replacement/replacing internal part number will replace current XYZ part number.
R: internal part number will replace this replacement/replacing internal part number.
* unit is used for-occurs the unit catalogue of this assembly.
* the minimum level in the parts catalogue file of these parts of low level-occur number.
* the program-level of plan-this parts.During zero service parts planning, use.
(2) the image of component file contains the schematic representation of every figure.
(3) parts catalogue (bill of materials) file.Presents lay out present table 7, following several respects are arranged:
* assembly number-engineering figure number.
* zero of part number-this assembly use is equipped with piece number.
* the serial number of the figure of serial number-Ben zero spare part.
* state-A: effectively
I: temporarily need not.
* quantity is used for-the required zero spare part number of this order of assembly
* scrap factor-with this zero relevant factor of scrapping of spare part.
* ECN number-be assigned to the engineering change control number of this change.
* ECN action-A: add assembly
D: leave out from assembly
The date of the ECN change that * changes data last time-these parts were done last time.
* number during actual the going into operation of accumulation number when going into operation-in the bulletin of this total cost parts.
* the averaging time-life expectancy of this parts, number when going into operation.
(4) the engineering change control documents comprises engineering change announcement file.The layout of this file is as shown in table 8, and its scope has:
* this ECN of engineering change number-be assigned to number
* ECN-criterion-DT: execution date
VU: supplier's part replacement inventory depletion
RU: internal part is changed inventory depletion
MR: will carry out the maintenance requirement of this change
* the ECN name of an article
(5) conventional scheduling (RS) incident file comprises following data:
The feature record of this record of * RS-number-sign
* RS-department/unit-department and machine group number
* the name of an article of the RS-name of an article-this RS
* triggering date of RS-scheduling date-propositions maintenance requirement (MR).Determine that the time that proposes a MR is with frequency and lead time and uses.
* between RS-frequency-generation MR the day number of times
* RS-lead time-before actual maintenance event, intend producing fate of a MR.
* RS-displacement-this MR begin the displacement
Number when * RS-closes-finish number that this requirement takes
* RS-right of priority-the finish priority of maintenance event; Be used for the maintenance operative combination.
Example: engineering change control and management subsystem operations
Table 9 is in components list file 7(Fig. 1 during the different phase to table 13 expression engineering change control) a comprehensive example.The components list file of table 9 explanation unit 670101.As follows to 4 engineering changes that unit 670101 is made:
(1) ECN123 will replace parts C by part B at 2/15/XX.This is an example of " date control " engineering change.
(2) ECN 456 will replace parts-F with parts-E when last parts of expenditure-F.This replaces the example of supplier's parts " material uses up " engineering change with another supplier's parts.
(3) ECN 789 is that (requiring (being that MR controls) by maintenance is foundation with the order of the maintenance improvement council.One parts (parts-K) replace with three parts.
(4) after XYZ parts 55687 materials use up, will replace inner XYZ parts (55687) with another inner XYZ parts (55666) to supplier parts parts-AECN886.This engineering change is to use the reciprocity parts from another supplier to replace supplier's parts.
Table 13 shows the components list file of change fully of unit 670101.
All these changes parts of will looking for novelty are added to the parts master file.Figure 10 illustrates that engineering change control and management subsystem 4 finishes these and change the operation carried out.At square frame 141, the row 30-34 in the table 6 is added to the parts master file.Because these parts in stock (square frame 142), and these parts had not been had engineering change control input (square frame 146), the parts of a 30-34 that is expert at are added to parts master file (square frame 143) after looking into note and having the XYZ part number.A row 34(10B110) for there not being stock item (square frame 142), because it does not have the XYZ part number.Therefore, it directly is added to parts master file (square frame 153).
Then, with reference to Figure 11, the inlet of engineering change control is established.ECN123-PM group adjusts-and be (square frame 175) controlled by date, will come into force at 2/15/XX.ECN456 is (square frame 173) of being encoded with supplier's part replacement carried out when parts-F uses up.This requirement, parts-F must be in parts master file (square frame 176), and now the Kuku storage greater than 0(square frame 177), add any reserve stock as needs.ECN789 will carry out-MIC improvement (square frame 172) change, and comes into force when finishing MR123.
Follow in good time correcting part catalogue with reference to Figure 12.All changes all are added to 01B1 assembly (square frame 202).Last 5 row (28-32) are added to parts catalogue (square frame 204). Row item 22 and 28 is intended carrying out at 2/15/XX by ECN123 control.Row item 22 will be left out.And row 28 was added in this date.
ECN 456 control row items 25 and 29.Row 25 will be left out, and keeps by supply minimum inventory level sending last supplier parts parts-F(reserved inventory) time adds row 29.
ECN 789 is last ECN that the parts catalogue will be carried out.Row item 25 is left out, and a row 30-32 is added when maintenance requires MR123 in finishing.
As the parts that are added to the parts catalogue are assemblies, will carry out two additional steps.Do once to check whether be present in other assemblies (square frame 206) to determine the assembly of intending adding.If exist, remake another inspection, to determine whether this has with reference to (square frame 207) this assembly in assembly structure.This will produce an infinite loop, so as detecting this situation, this just adds and is rejected (square frame 208).
The low level coding and the program-level coding of assembly add an increment 1(square frame 210), and encode by parts low level coding and program-level and to be stored, the plan level code is to use during zero service parts planning, know before ordering goods to guarantee must replenish in calculating to all requirements of parts.
Final step be when being transfused to (square frame 212) at MR as effectively (A) or when not importing MR as temporarily need not (I) adding parts on (square frame 212).One is encoded as temporary transient no parts, except as editor's usefulness, will be left in the basket in all purposes.
Last ECN(886) carried out by the parts master file, capable 24 in table 6 is carried out when XYZ part number 55687 uses up.
Table 10 shows that the parts catalogue of three ECN670101 undetermined is arranged.When the effective parts catalogue of access, only show those unspent parts when ECN is closed.Table 14 is presented at ECN, and none is closed down, in effective parts catalogue of 670101 of 2/14/XX.
Take advantage of a situation down, table 11-13 illustrates the parts catalogue when each ECN closes.Table 11 shows when ECN 123 pent 2/14/XX.Table 12 shows when closing in pairs for ECN 123 and 456.Be in all executed parts catalogue of all three ECN at last.
To the engineering change of self-winding parts model is to send a maintenance when requiring (square frame 115 of Fig. 9) or require to be closed (Fig. 9 square frame 107) time in a maintenance and carried out at parts.Figure 27 shows the sequence of operation of closing ECN.
With reference to Figure 13, send a maintenance and require each parts of (square frame 221) all to be examined, to determine that these parts are whether under ECN control (square frame 222).If parts require just to lie on the table by (square frame 224) not under ECN control, and notice Engineering Service portion does to correct action (square frame 225).
If parts are under ECN control (square frame 222), the parts (square frame 223) that use up under the control at XYZ come in good time correcting part master file (square frame 229) by supersede XYZ part number being moved on to XYZ part number scene.Then, ECN is closed (square frame 230), and removes from the ECN file.So process just finishes (square frame 231).
Be encoded to parts of issuing the parts directory entry (square frame 226) of leaving out (DEL) and can lie on the table by (square frame 224), and do to correct action (square frame 225) by Engineering Service portion.
The ECN(square frame 234 that supplier is used up) will revise its all ECN(square frames 232 therewith in good time) relevant parts catalogue.The worn part that is encoded to DEL on the parts catalogue moves on to ECN/ parts catalogue history (square frame 233), and removes from the parts catalogue.This ECN also will close (square frame 235) this moment, and its process finishes (square frame 236).
It is under MR control that remaining ECN changes.In one period, parts can be sent to a MR.Every one parts will cause the parts catalogue must be with in good time correction (square frame 237), and the parts history file is revised (square frame 238) in good time.ECN by verification whether change and make (square frame 239).As change and make, ECN closes (square frame 245), and moves on to ECN history (square frame 241).Process finishes.
Close (square frame 243) as MR, but ECN still opens (square frame 247), require just to lie on the table by (square frame 244), and action is made by notice Engineering Service portion (square frame 246).
ECN/ parts catalogue history file includes the change to the components list file.The components list file can be put at any time and draw up again.But from history file also leads component usage statistics, averaging time failure rate and maintenance frequency.
Operation is described in detail: zero Parts Inventory ADMINISTRATION SUBSYSTEM 6
Refer again to Fig. 1, the details of spare parts management subsystem 6 now are described.Zero spare part comprises four kinds of stock's unit types:
General parts, such as nut, bolt and packing ring, these parts keep by the gross and send when requiring.These parts are documented in zero Parts Inventory ADMINISTRATION SUBSYSTEM and the components list file for your guidance.
Stock's parts do not comprise that frame, gate etc. can not require the parts of changing.These parts are recorded in the components list file for reference, and for complete segmentation catalogue is provided, also charge to components list.
Rapid wear is that parts do not remain in and produce bill of materials person and list catalogue such as cementing agent in by component items.The die of the printed product marking, printing ink and cutting knife are that easily worn part does not remain on the other example of producing the bill of materials.During these component wears or when using up to change.When going into operation according to future, counts by rapid wear zero spare part plan.Change when for example, cutting knife begins in each class of production.Thereby each modulated degree unit must have a whole set of cutting knife, is used for each modulated degree and produces class.For the required cutting knife that is supported in workshop scheduling accumulative total promptly produces every day, weekly or every month required cutting knife quantity.
Field-replaceable unit such as fan, motor, axle and driving wheel, is longer life to be arranged but some zero spare parts that can break down.These parts have failure rate averaging time of the former preliminary assessment degree of supplier.Supplier supplies these parts usually.Number pushes away to these parts during real-world operation, and number just possesses, on-stream time and failure rate and adjust the ability that the part replacement predicted compares by the time averaging time during accumulative total the going into operation of its future.
Usually, zero Parts Inventory ADMINISTRATION SUBSYSTEM 8 following management, zero spare parts purchasing: inventory part is not met buying when requiring.General parts are ordered goods with general " ordering point " technology.Change Yan worker,, just send the order that replenishes by predetermined order quantity when dropping to below the ordering point in storehouse quantity.Rapid wear and field-replaceable unit are to use by the technology of time adjustment requirement to manage.This now is described as follows by the time adjustment technology.
With reference to Figure 14, generally there are four steps in the cycle of plan.The first step in square frame 260, obtains the demand of zero spare part.In second step,, collect on-hand inventory and order to be purchased in square frame 261.In the 3rd step,, calculate the scheduling of adjusting by the time that replenishes in square frame 262.Final step in square frame 263, is determined to buy the family and is recommended.Each step of these steps now is described.
At square frame 260, obtain spare part requirement.The demand of zero spare part is from three aspects: zero spare part that identify in the components list file (1), and zero spare part that identify in the plan inventory (2), and (3) implement the zero spare part to a specific maintenance requirement.Demand from preceding two aspects is calculated by same way as, is illustrated below in conjunction with Figure 16.Implementing the zero spare part of requiring for a concrete maintenance is added in the calculated spare part requirement.
(1) the zero spare part that identifies at the components list file:
Said each supply commercial city parts handbook that its equipment successfully assembles that furnishes an explanation.The engineering drawing of all component and parts catalogue all are included in the components list.When maintaining or plan engineering change, be with reference to these components lists.The components list file is the reproduction of a bill of materials of all supplier's components lists.The components list file is organized all supplier's components lists of expression one unit.This just provides the multi-level bill of materials for each unit.Figure 15 is an explanation.In the components list file each all has the classification of inventory of appointment, promptly generally, not stock, rapid wear or replaceable.
Each parts that classifies as " rapid wear " or " replaceable " all have one averaging time failure rate.Averaging time, fault was the running hours that go into operation that these parts may break down and maybe need change.Each parts is all accumulated its actual running hours that go into operation-be stored in accumulation running hours scene that goes into operation.The plan running hours weekly of these parts are also added up.The plan running hours are when being added to real-world operation on the number.Itself and with averaging time fault make comparisons.Whenever surpassing the averaging time failure rate, the plan running hours just draw up component demand.
When these parts are made replacing, number is with regard to return-to-zero during real-world operation, and the accumulative total 2 of number is restarted during real-world operation.Each information of having changed parts all moves on to the parts history file.Unit, device number, MR number and other relevant datas are all preserved.These parts in the contrast machine group number take statistics and analyze to consult its of failure rate averaging time.Consult failure rate averaging time that supplier provides, and be necessary just to be changed as seeing.
The guarantee period interior replacing parts that still are in supplier are listed the replacing insurance period.Number is kept when supplier's dated and/or insurance, for the insurance period contrast.
(2) at certified zero spare part of plan inventory:
Said that " plan inventory " can be the maintenance event of conventional scheduling and set up, changed and maintenance event such as easily worn part such as prevention and maintain, machine configuration.The maintenance inventory of this type clearly stipulates to carry out each required zero spare part of a maintenance event.This just provides greater flexibility for Engineering Service, uses tricks to draw a clear single rather than with the detailed catalogue of compiling in the components list file, can be zero service parts planning and set up the parts catalogue.
Engineering Service portion can draw up a plan inventory needn't change the components list file with the plan engineering change.The plan inventory is used to assess the machine change and plans new machine part.For example, a upgrading substitutes and requires 50 new parts to replace 40 worn parts at each position of machine.40 parts that the plan inventory of drawing up is listed 50 new parts and intended changing.This plan inventory is used to dispatch the parts delivery of adjusting by the time.Following out-of-date parts (intending the parts of replacing) inventory are according to plan progressively replaced.The actual execution of this planned project is to realize by the components list file under the above-mentioned engineering change control.Plan inventory Withdrawl when plan item is finished.
(3) implement the zero spare part of requiring for specific maintenance:
For carrying out the planned maintenance requirement of specific maintenance event, can specifically make desired parts.These parts are implemented to this specific maintenance requirement.These parts are not supplied to conventional maintenance purposes.
With reference to Figure 16, existing explanation is calculated by the time and is adjusted the detail operations (Figure 14 square frame 262) that replenishes.At square frame 270, master unit file level is according to plan read.This just guarantees all requirements of each parts were all calculated before scheduling replenishes order.For example, program-level is encoded to 5 parts and is intended in after the level 0-4, so that all demands of these parts of being defined as level 0-4 will all soon already be added up out when doing the scheduling of level 5.
One parts are one " assembly ", and promptly relevant with it have more parts of low level, must push away to its parts catalogue each to its accumulation running hours that go into operation.Thereby, whether be that an assembly is made examination at square frame 271, one parts with regard to it.
Conducting a survey at square frame 272 is for determining that parts whether under the control at ECN, if these parts are to use up at ECN under (square frame 273) control, at this moment hold fire.Use up is to carry out during calculating the stage of replenishing below.Be added to the parts of components list file or calculation note, become the effective date up to ECN, its running hours that go into operation/require equal return-to-zero (square frame 275) from downpayment.At the file of self-winding parts table or the deletion of plan inventory, the phase finished all to give return-to-zero (square frame 276) up to the plan prospect in its running hours/requirement that goes into operation became effectively from ECN.
Example: zero spare part is ordered goods
Table 15 explanation ECN change is applied to aforesaid operations.Assembly 01B1-system machine segmentation 1(sees Table 10) two parts are arranged under ECN control.Parts 01B13 parts-C is under ECN 123 controls.Date of expiration this parts of 2/15/XX from then on assembly leave out.Parts 01B12 parts-B is also under ECN 123 controls.These parts will be added to this assembly at term of validity 2/15/XX.By the parts of maintenance requirement under ECN control, the from date of its MR is used to determine that an ECN plans the period that will come into force.
Go into operation running hours/requirement at the assembly under the ECN control must execution under ECN control.All parts in this assembly are controlled by same ECN all, and therefore, only running hours/the requirement that goes into operation that comes into force at this ECN will be pushed to each parts.
Return Figure 16, now push away to each parts that constitute this assembly in the square frame 277 running hours/requirement that goes into operation.
The parts of non-assembly (square frame 271), its running hours that go into operation convert requirement (square frame 278) to.Table 16 is examples.The actual running hours that go into operation of parts-C were 100 hours in last week.The plan of these parts goes into operation running hours demonstration branch in the 1st to the 21st week.Failure rate averaging time of these parts is 1375 hours.Institute's requested number is calculated as follows:
Accumulation running hours before (1) number is added to during real-world operation are given the accumulation running hours that make new advances.
(2) plan running hours weekly and be added to the accumulation running hours, provide prediction and accumulate running hours weekly.
(3) prediction accumulation running hours surpass averaging time during failure rate weekly, just require to change parts.Prediction accumulation running hours are resetted to failure rate averaging time of prediction accumulation running hours by deducting.
In the example of table 16, the accumulation running number before this planning cycle is 900.The cumulative actual running number in preceding week is 100 hours.New accumulation running number is 1000.Prediction accumulation running number is an increment with the plan running hours weekly.The prediction accumulation running hours in the 1st week are 1100.At this moment prediction accumulation running several 1000 adds what the 1st week plan running hours 100 drew before.This calculates the whole plan prospect that always proceeds to.
Press the example of table 16, after calculating good each prediction accumulation running hours, it with averaging time failure rate compare, at every turn above just producing one " requirement " averaging time during failure rate.This takes place twice at table 16.One prediction accumulation running hours 1400 were arranged in the 5th week.Averaging time, failure rate was 1375.Because prediction accumulation running hours surpass failure rate 25 hours averaging time (1400-1375), so produce a requirement.Prediction accumulation running hours deduct failure rate averaging time.And the calculating of prediction accumulation running hours restarts.One prediction accumulation running hours 125 were arranged in the 6th week, were the prediction accumulation running hours 25(1400-1375 in the 5th week) add that the plan running hours 100 in the 6th week draw.The requirement that produces is in the 21st week for the second time.
Now get back to Figure 16, be added to the requirement from previous step (square frame 278) implement for the required ask for something (square frame 280) of a concrete maintenance at square frame 275." pushing away " under all requirements already of these parts arrived this program-level.
So at square frame 282, the Kuku is deposited and all purchases of leaving of these parts is ordered goods now, obtains with zero spare part in the name of article of above-mentioned components list file.To this point, all requirement all learn, and know present stock, reality (30) and in the situation of (20) calmly.
These parts are known other items.Order quantity is 20, and promptly each the order is 20.Supplier requires the last fortnight notice is put forward in the delivery of these parts, so first line time was 2 weeks.Be that these parts do not have safety inventories at last; Promptly use " immediately " technology.Order quantity, first line time and safety inventories all are variablees, and can put any value.
At square frame 281, existing calculating replenishes.Table 17 shows this calculating.Calculate the present storehouse of prediction amount by following formula:
Storehouse amount (N-1) required amount (N)+just is at order quantity (N)+plan order quantity (N) now
Order goods in the plan that produces in this week that the storehouse amount drops to below the safety inventories amount in prediction.The order that replenishes is to be remedied by first line time to need producing when week of this order quantity.
The prediction that below is each week is in the storehouse;
The 1st week was 20, i.e. (30-10+0+0);
The 2nd week was 30, i.e. (20-10+20+0);
The 3rd week was 15, i.e. (30-15+0+0);
The 4th week was 7, i.e. (15-8+0+0);
The 5th week was-3, i.e. (7-10+0+0).
Prediction is negative in the storehouse in the 5th week; Promptly drop to safety inventories below 0.Therefore, must send a purchase order in the 5th all arrivals.Be to draw up plan order 20(order quantity 20 the 5th week).The first line time of these parts was 2 weeks.For making parts at the 5th all arrivals, must be at the order that replenishes that sends 20 parts the 3rd week.Calculating prediction begins again in the storehouse.
Prediction to following each week is measured in the storehouse;
The 5th week was 17, i.e. (7-10+0+20);
The 6th week was 7, i.e. (17-10+0+0);
The 7th week was 19, i.e. (7-8+0+20).
If the plan of these 20 parts is ordered goods and do not produced, measuring in the storehouse to the prediction in the 7th week will be negative (1).Prediction then is all identical in the storehouse computing method.
Refer again to Figure 16,, parts are used up the inspection of control as ECN at square frame 283.If parts intend being eliminated (replacing) when using up, must push away to replacing parts (square frame 284) the requirement of this parts remainder.Table 18 shows this example.Parts 01B16 parts-F be under ECN456 control-use up and will replace by 01B15 parts-E.(prediction of parts-F) is negative (3) for the first time in the storehouse be at the 5th week (square frame 285) to these parts.The remainder in this 5th week of parts (3) is required and all forward requirements all push away at the replacing parts of square frame 286 (01B15 parts-E).This changes parts at least than the low program-level of existing program-level.This guarantees that the remainder that contrasts parts requires to be included in the demand of changing parts.This technology only is used to plan purpose.Spare part is actual when sending from zero at last parts, and ECN promptly accuses and comes into force.
Last function of carrying out in cycle at zero service parts planning is that the user recommends (square frame 287).Though when this system planning sends out purchase order or proposition reschedules a current purchase order, the user still has a responsibility for the promise of corporation de facto.This system does not directly send or reschedules purchase order automatically.Yet those skilled in the art should know that this system can be designed to send automatically or reschedule purchase order.
Disclosed general desirable embodiment of the present invention in accompanying drawing and standard, though adopted certain conditions, this is only used for meaning general and narration, and unconfined purpose, and scope of the present invention is proposed by following claim.
Table 2C
Production/maintenance project
MIC order/change and time dependence maintenance requirement
Maintenance requires unit week
MR1-MIC-MOD 1A-1 5
The MR2-MIC 1A-2 3 that upgrades
MR3-RS 3A-1 5
MR4-RS 3A-3 3
MR5-RS 3A-3 6
MR6-PM 1A-1 5
MR7-PM 1A-2 5
MR8-PM 1A-3 4
MR9-PM 3A-1 5
MR10-PM 3A-2 6
MR11-PM 3A-3 6
Table 2D
Production/maintenance project
MIC order/change and time dependence maintenance requirement
Maintenance requires unit week
MR1-MIC-MOD 1A-1 5
The MR2-MIC 1A-2 3 that upgrades
MR3-RS 3A-1 6
MR4-RS 3A-3 3
MR5-RS 3A-3 6
MR6-PM 1A-1 5
MR7-PM 1A-2 5
MR8-PM 1A-3 4
MR9-PM 3A-1 6
MR10-PM 3A-2 7
MR11-PM 3A-3 6
Table 8
The engineering change announcement
ECN# ECN criterion ECN project
Date, maintenance require, use up, replacing next time,
1 1010 D 02/10/XX change old figure
2 1011 D 02/05/XX improve ignition distributor
1. 3 123 D 02/15/XX PM group is scheduled
4 456 U F inventory depletions 2.
5 789 M MR123 MIC upgrading change 3.
4. 6 886 U RJR RJR use up
Table 9
The parts catalogue
Part number NBR name of an article ECN ECN criterion
670101 units
.01A packaging machine
.01B make machine
..01B1 segmentation-11
... 01B11 parts-A
... 01B13 parts-C
... 01B14 parts-D
... 01B16 parts-F
... 01B17 parts-G
... 01B111 parts-K
Table 10
The parts catalogue
Part number name of an article ECN ECN criterion
670101 units
.01A packaging machine
.01B make machine
..01B1 segmentation-1-1
... 01B11 parts-A
... 01B12 parts-B 123 02/15/XX
... 01B13 parts-C 123 DEL 02/15/XX
... 01B14 parts-D
... 01B15 parts-E 456 uses up (parts-F)
... 01B16 parts-F 456 DEL use up (parts-F)
... 01B17 parts-G
... 01B18 parts-H 789 MR123
... 01B19 parts-I 789 MR123
... 01B110 parts-J 789 MR123
... 01B111 parts-K 789 DEL MR123
Table 11
The parts catalogue
Part number name of an article ECN ECN criterion
670101 units
.01A packaging machine
.01B make machine
..01B1 segmentation-1-1
... 01B11 parts-A
... 01B12 parts-B 123 02/15/XX
... 01B14 parts-D
... 01B15 parts-E 456 uses up (parts F)
... 01B16 parts-F 456 DEL use up (parts-F)
... 01B17 parts-G
... 01B18 parts-H 789 MR123
... 01B19 parts-I 789 MR123
... 01B110 parts-J 789 MR123
... 01B111 parts-K 789 DEL MR123
Table 12
The parts catalogue
Part number name of an article ECN ECN criterion
670101 units
.01A packaging machine
.01B make machine
..01B1 segmentation-1-1
... 01B11 parts-A
... 01B12 parts-B 123 02/15/XX
... 01B14 parts-D
... 01B15 parts-E 456 uses up (parts F)
... 01B17 parts-G
... 01B18 parts-H 789 MR123
... 01B19 parts-I 789 MR123
... 01B110 parts-J 789 MR123
... 01B111 parts-K 789 DEL MR123
Table 13
The parts catalogue
Part number name of an article ECN ECN criterion
670101 units
.01A packaging machine
.01B make machine
..01B1 segmentation-1-1
... 01B11 parts-A
... 01B12 parts-B 123 02/15/XX
... 01B14 parts-D
... 01B15 parts-E 456 uses up (parts-F)
... 01B17 parts-G
... 01B18 parts-H 789 MR123
... 01B19 parts-I 789 MR123
... 01B110 parts-J 789 MR123
Table 14
Not having ECN at 2/14/XX is added into
The parts catalogue
Part number NBR name of an article ECN ECN criterion
670101 units
.01A packaging machine
.01B make machine
..01B1 segmentation-1-1
... 01B11 parts-A
... 01B13 parts-C 123 DEL 02/15/XX
... 01B14 parts-D
... 01B16 parts-E 456 DEL use up (parts-F)
... 01B17 parts-G
... 01B111 parts-K 789 DEL MR123
Claims (30)
1, a kind of computer integrated manufacturing system computer generalization maintenance system that is used for, computer integrated manufacturing system comprises a computer control, be used to control a plurality of production units, each unit comprises many production machines, this manufacturing system computer control comprises an electron storage total activation file, wherein have the actual production of a plurality of units and the scheduling of planned production, this manufacturing system computer control is controlled many production machines according to the planned production in the total activation file; Described computer generalization maintenance system comprises:
The components list of one electron storage wherein comprises the layered directory of the parts in many machines of a plurality of units; And
Maintenance operational computations machine control device is connected communication and is used for being connected communication with the total activation file with above-mentioned electronic storaging part table, it comprises:
Obtain first means of the actual production and the planned production scheduling of multinomial unit from the total activation file;
According to the scheduling that obtains, identify the parts in the interior on a predetermined date layered directory that is kept, and each is identified the second means of the corresponding maintenance of parts in predetermined period to identify this;
According to the parts layered directory in the components list of electron storage, this is identified that parts assign corresponding service time again, with the 3rd means of the production time loss that reduces these a plurality of units;
According to service time, produce the 4th means of the correction scheduling of planned production to being identified that parts are assigned again; And
Communication plan production correction is dispatched to the 5th means of total activation file; Thus,, can be controlled, can be maintained activity so that improve when producing to greatest extent to these a plurality of units according to the correction scheduling of planned production.
2, computer generalization maintenance system as claimed in claim 1 is characterized in that the 3rd means comprise:
Determine when temporary transient no means of a unit according to the scheduling that obtains; And, be reassigned into the means of unit in the time that wouldn't use that comprise these some parts at least of being identified parts to the corresponding service time of at least some parts of certified parts.
3, computer generalization maintenance system as claimed in claim 1, it is characterized in that described the 3rd means comprise, the means that at least some service times in the corresponding service time of being identified parts in one unit are made up are to reduce the production time loss of this unit.
4, computer generalization maintenance system as claimed in claim 3 is characterized in that described the 3rd means further comprise a critical component to be maintained in the unit and the means of corresponding crucial service time identified; And the means that at least some service times of the corresponding service time of the miscellaneous part in this unit are reassigned into this key service time.
5, computer generalization maintenance system as claimed in claim 1 is characterized in that described the 3rd means further comprise the means of determining to carry out the maintenance man-hours requirement by the service time of assigning again; And the means of further assigning this appointment service time again, so that can just can maintain for power power.
6, computer generalization maintenance system as claimed in claim 1, it is characterized in that described electronic storaging part table further comprises selected service life of a machine end indicator in the production machine, this end-of-life indicator indicates this relevant modulated degree of production machine to change or to change; The parts that described the 3rd means comprise in the machine that the existing relevant life-span is indicated are cancelled the means of its corresponding maintenance, thereby reduce the production time loss.
7, computer generalization maintenance system as claimed in claim 1 is characterized in that described electronic storaging part table comprises an image file that comprises the parts respective image in the layered directory again.
8, computer generalization maintenance system as claimed in claim 1 is characterized in that described layered directory comprises the complete bill of materials of each unit.
9, computer generalization maintenance system as claimed in claim 1 is characterized in that the manufacturing system computer control further comprises an engineering change file, wherein has engineering change producing the scheduling of carrying out on the machine;
The communication that also links to each other of described maintenance operational computations machine controller with the engineering change file;
Described first means also obtain the engineering change scheduling from the engineering change file; And
Described second means further comprises according to the scheduling of the actual production that obtains and planned production with according to the scheduling of the engineering change that obtains, the means that the parts that will do to maintain and corresponding service time are made evaluation.
10, computer generalization maintenance system as claimed in claim 1 is characterized in that described the 3rd means further comprise:
Receiving the schedule time carries out the means of indication of the not planned maintenance of trouble unit; And
To the means of being assigned again as first by at least some corresponding service times of evaluation parts in the same unit, so that corresponding with the schedule time;
Thereby at least some planned maintenances are not rescheduled to take place during the planned maintenance.
11, a kind of computer generalization maintenance system that is used for computer integrated manufacturing system, this computer integrated manufacturing system comprises a plurality of production units of control, every unit comprises the computer control of many production machines, this manufacturing system computer control comprises an electron storage total activation file, wherein have the actual production of a plurality of units and the scheduling of planned production, this manufacturing system computer control is according to many production machines of the control of the planned production in the total activation file, and described computer generalization maintenance system comprises:
According to the planned production in the total activation file, identify the parts of in predetermined period, intending maintenance in the layered directory and to identifying that parts dispatch its maintenance activity and produce the maintaining and dispatching ladder of management of interrupting to reduce;
Engineering change control activity is attached to the engineering change control and management means of dispatching in the maintenance activity;
Respond maintenance activity and engineering change control ability, revise the components list ladder of management of layered directory in good time; And
To being identified that parts send the replacing parts and must be provided the zero Parts Inventory ladder of management that claims in the maintenance activity of scheduling.
12, computer generalization maintenance system as claimed in claim 11 is characterized in that described maintaining and dispatching ladder of management further comprises:
Receive the means of the instruction that planned maintenance not will carry out at predetermined period; And
According to the planned production in the total activation file and not planned maintenance indication to being identified that parts scheduling maintenance activity is to reduce the means of interrupting of producing.
13, computer generalization maintenance system as claimed in claim 11 is characterized in that described maintaining and dispatching ladder of management, according to one of the use predicted or passing through the time since changing last time, has identified the parts of intending maintenance in predetermined period.
14, computer generalization maintenance system as claimed in claim 11 is characterized in that described maintaining and dispatching ladder of management maintains the same time by the key that the predetermined non-key maintaining and dispatching of unit is become this predetermined unit and reduce to greatest extent to produce and interrupt.
15, computer generalization maintenance system as claimed in claim 11 is characterized in that described maintaining and dispatching ladder of management also comprises to be supported moving scheduling so that the means of predetermined people's force level are used in the execution of the maintenance activity that is scheduled to identifying that parts are gone bail for.
16, computer generalization maintenance system as claimed in claim 11, it is characterized in that described parts layered directory in described electronic storaging part table comprise to by from minimum to the multinomial hierarchy of components of highest level; And wherein minimum each parts of level be accredited as that field-replaceable unit is consumed in process of production, longer life is arranged but the field-replaceable unit that certainly will wear and tear or break down, a large amount of in producing machine what use is the general parts of common component and the not inventory part that generally do not require replacing.
17, computer generalization maintenance system as claimed in claim 11 is characterized in that described engineering change control and management means comprise the means that the maintenance activity according to specific Engineering Control execution date, zero spare parts consumption or specific maintenance movable handle engineering change control activity and adjustment combines.
18, computer generalization maintenance system as claimed in claim 11 is characterized in that described maintaining and dispatching ladder of management also comprises the per diem maintaining and dispatching that produces the maintenance activity of intending carrying out every day of being identified and interrupts to reduce to produce.
19, computer generalization maintenance system as claimed in claim 11 is characterized in that further comprising:
One electron storage, zero Parts Inventory file is to identify the field-replaceable unit of using in the general parts used in the above-mentioned multinomial production machine and the above-mentioned multinomial production machine; And
Described zero Parts Inventory ladder of management also comprise when tank farm stock drop to scheduled volume produce general part requirement when following and identify change part requirement must be when adjusting the maintenance activity means of ready for use.
20, a kind of computer generalization maintenance system is used to be included in the unit that execution one premiere feature requires many machines of maintenance simultaneously again; Described computer generalization system comprises:
Electronic storaging part table of parts classification inventory with many machines of this unit; And
Connect the maintenance operational computations machine control device of linking up described electronic storaging part table, it comprises:
Obtain first means of the scheduling of actual and these many machines of calculating use;
According to the scheduling that obtains, identify in predetermined period, to remain on the parts of this layered directory and identify the second means that each is identified the corresponding service time of parts in predetermined period;
According to the parts layered directory in the electronic storaging part table, assign the service time of being identified parts the 3rd means again with loss of time of reducing this unit; And
According to the service time of assigning again of being identified parts, the correction scheduling that the plan of generation is used;
Thereby the use to unit can be controlled so that can maintain activity according to the correction scheduling that plan is used.
21, computer generalization maintenance system as claimed in claim 20 is characterized in that described the 3rd means comprise:
Determine when temporary transient no means of a machine according to the scheduling that obtains; And
The corresponding service time of at least a portion of being identified parts is reassigned into these at least some parts of being identified parts in temporarily need not in.
22, computer generalization maintenance system as claimed in claim 20, it is characterized in that described the 3rd means comprise the means that at least some service times of the corresponding service time of being identified parts in the machine are made up, to reduce loss service time of this machine.
23, computer generalization maintenance system as claimed in claim 20, it is characterized in that described the 3rd means also comprise the critical component of plan maintenance in evaluation one machine and the means of corresponding crucial service time, and the means that the corresponding service time of miscellaneous part in this machine are reassigned into this key service time.
24, computer generalization maintenance system as claimed in claim 20, it is characterized in that described the 3rd means also comprise determines to carry out this by the service time of assigning again and maintains the means of required manpower, and the means of assigning this service time of assigning again again, so that maintenance can just be carried out for somebody's power.
25, computer generalization maintenance system as claimed in claim 20 is characterized in that described electronic storaging part table also comprises selected service life of a machine end indicator, and this end-of-life indicator indicates the modulated degree of this correlation machine to intend the indication of changing or changing; And wherein said the 3rd means comprise the means that its corresponding maintenance of machine part with relevant end-of-life indication is cancelled, thus the loss that reduces service time.
26, computer generalization maintenance system as claimed in claim 20 is characterized in that described electronic storaging part table also has an image file that comprises the respective image of parts in the layered directory.
27, computer generalization maintenance system as claimed in claim 20 is characterized in that described layered directory comprises a complete material inventory of each machine.
28, computer generalization maintenance system as claimed in claim 20 is characterized in that described maintenance operational computations machine controller also comprises:
To being identified that parts produce the 5th means of a catalogue, with the convenient order of being identified parts.
29, computer generalization maintenance system as claimed in claim 20 is characterized in that also comprising an engineering change file, wherein has plan to make the scheduling of engineering change at this machine;
And wherein said maintenance operational computations machine controller connects communication engineering change file; And
Wherein said first means also obtain the scheduling of engineering change from the engineering change file, and
Wherein said second means also comprises the scheduling used according to the reality that obtains and plan and according to the scheduling of the engineering change that obtains, and identifies the parts of intending maintenance and the means of its corresponding service time.
30, computer generalization maintenance system as claimed in claim 20 is characterized in that described the 3rd means also comprise:
Receive schedule time internal fault parts and make not calculate the means of the indication of maintenance; And
At least some service times of being identified the corresponding service time of parts at uniform machinery are to correspond to the means that the described schedule time assigns again as first parts;
Thereby at least some planned maintenances are rescheduled between planless defects liability period and take place.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/552,728 US5216612A (en) | 1990-07-16 | 1990-07-16 | Intelligent computer integrated maintenance system and method |
| US552,728 | 1990-07-16 |
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| Publication Number | Publication Date |
|---|---|
| CN1063169A CN1063169A (en) | 1992-07-29 |
| CN1027400C true CN1027400C (en) | 1995-01-11 |
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| CN91104929A Expired - Fee Related CN1027400C (en) | 1990-07-16 | 1991-07-16 | Intelligent computer integrated maintenance system and method |
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| US (1) | US5216612A (en) |
| EP (1) | EP0467257A3 (en) |
| JP (1) | JPH04260971A (en) |
| KR (1) | KR920003192A (en) |
| CN (1) | CN1027400C (en) |
| AU (1) | AU634399B2 (en) |
| CA (1) | CA2043890C (en) |
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| US5315509A (en) * | 1989-10-23 | 1994-05-24 | International Business Machines Corporation | Artificial intelligence system for item analysis for rework shop orders |
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| US5089970A (en) * | 1989-10-05 | 1992-02-18 | Combustion Engineering, Inc. | Integrated manufacturing system |
-
1990
- 1990-07-16 US US07/552,728 patent/US5216612A/en not_active Expired - Lifetime
-
1991
- 1991-06-05 CA CA002043890A patent/CA2043890C/en not_active Expired - Fee Related
- 1991-06-07 ZA ZA914385A patent/ZA914385B/en unknown
- 1991-06-12 AU AU78355/91A patent/AU634399B2/en not_active Ceased
- 1991-07-15 MX MX9100207A patent/MX174226B/en not_active IP Right Cessation
- 1991-07-15 KR KR1019910012338A patent/KR920003192A/en not_active Application Discontinuation
- 1991-07-15 EP EP19910111751 patent/EP0467257A3/en not_active Withdrawn
- 1991-07-16 CN CN91104929A patent/CN1027400C/en not_active Expired - Fee Related
- 1991-07-16 JP JP3199818A patent/JPH04260971A/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP0467257A2 (en) | 1992-01-22 |
| KR920003192A (en) | 1992-02-29 |
| CA2043890C (en) | 1998-05-19 |
| AU7835591A (en) | 1992-01-16 |
| CN1063169A (en) | 1992-07-29 |
| MX174226B (en) | 1994-04-28 |
| JPH04260971A (en) | 1992-09-16 |
| AU634399B2 (en) | 1993-02-18 |
| ZA914385B (en) | 1992-04-29 |
| US5216612A (en) | 1993-06-01 |
| EP0467257A3 (en) | 1993-08-18 |
| CA2043890A1 (en) | 1992-01-17 |
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